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Occipitofrontalis - occipital body origin and insertion
O: occipital bone; i: aponeurosis
Occipitofrontalis - frontal body origin and insertion
O: aponeurosis; i: skin of eyebrows and nose
Facial muscles nerve:
Facial nerve (VII)
Masseter nerve
Trigeminal (V)
Occipitofrontalis action
Move scalp back and forth, wrinkle forehead, elevates eyebrows
Orbicularis oculi origin
Frontal and maxillary bones
Orbicularis oculi insertion
circles orbit, extends within eyelid
Orbicularis oculi action
closes eyelids
Orbicularis oris origin
nasal septum, maxilla, mandible
Orbicularis oris insertion
fascia and lip muscles
Orbicularis oris action
closes lips and is important in mastication
Levator labii superioris origin
maxilla
Levator labii superioris insertion
orbicular oris of upper lip
Levator labii superioris action
elevate upper lip
Levator angula oris origin
maxilla
Levator angula oris insertion
orbicularis oris at mouth corner
Levator angula oris action
smiling muscle
Zygomaticus major origin
zygomatic arch
Zygomaticus major insertion
orbicularis oris at mouth corner
Zygomaticus major action
real smiler (draws angle of mouth superolaterally)
Mentalis origin
mandible near symphysis
Mentalis insertion
chin skin
Mentalis action
elevate lower lip
Depressor anguli oris origin
lower border of mandible
Depressor anguli oris insertion
lip near mouth angle
Depressor anguli oris action
depress angle (corner) of mouth
Buccinator origin
alveolar ridge of mandible and maxilla
Buccinator insertion
orbicularis oris at mouth angle
Buccinator action
sucks in sides of mouth, compresses cheeks, pulls corner of mouth laterally (like when blowing on trumpet)
Risorius origin
platysma and masseter fascia
Risorius insertion
orbicularis oris and skin at mouth angle
Risorius action
abducts angle of mouth
Masseter origin
zygomatic arch
Masseter insertion
angle and ramus of mandible